Python code coverage for Lib/idlelib/idle_test/test_undo.py

#	count	content
1	n/a	"""Unittest for UndoDelegator in idlelib.undo.py.
2	n/a
3	n/a	Coverage about 80% (retest).
4	n/a	"""
5	n/a	from test.support import requires
6	n/a	requires('gui')
7	n/a
8	n/a	import unittest
9	n/a	from unittest.mock import Mock
10	n/a	from tkinter import Text, Tk
11	n/a	from idlelib.undo import UndoDelegator
12	n/a	from idlelib.percolator import Percolator
13	n/a
14	n/a
15	n/a	class UndoDelegatorTest(unittest.TestCase):
16	n/a
17	n/a	@classmethod
18	n/a	def setUpClass(cls):
19	n/a	cls.root = Tk()
20	n/a	cls.text = Text(cls.root)
21	n/a	cls.percolator = Percolator(cls.text)
22	n/a
23	n/a	@classmethod
24	n/a	def tearDownClass(cls):
25	n/a	cls.percolator.redir.close()
26	n/a	del cls.percolator, cls.text
27	n/a	cls.root.destroy()
28	n/a	del cls.root
29	n/a
30	n/a	def setUp(self):
31	n/a	self.delegator = UndoDelegator()
32	n/a	self.delegator.bell = Mock()
33	n/a	self.percolator.insertfilter(self.delegator)
34	n/a
35	n/a	def tearDown(self):
36	n/a	self.percolator.removefilter(self.delegator)
37	n/a	self.text.delete('1.0', 'end')
38	n/a	self.delegator.resetcache()
39	n/a
40	n/a	def test_undo_event(self):
41	n/a	text = self.text
42	n/a
43	n/a	text.insert('insert', 'foobar')
44	n/a	text.insert('insert', 'h')
45	n/a	text.event_generate('<<undo>>')
46	n/a	self.assertEqual(text.get('1.0', 'end'), '\n')
47	n/a
48	n/a	text.insert('insert', 'foo')
49	n/a	text.insert('insert', 'bar')
50	n/a	text.delete('1.2', '1.4')
51	n/a	text.insert('insert', 'hello')
52	n/a	text.event_generate('<<undo>>')
53	n/a	self.assertEqual(text.get('1.0', '1.4'), 'foar')
54	n/a	text.event_generate('<<undo>>')
55	n/a	self.assertEqual(text.get('1.0', '1.6'), 'foobar')
56	n/a	text.event_generate('<<undo>>')
57	n/a	self.assertEqual(text.get('1.0', '1.3'), 'foo')
58	n/a	text.event_generate('<<undo>>')
59	n/a	self.delegator.undo_event('event')
60	n/a	self.assertTrue(self.delegator.bell.called)
61	n/a
62	n/a	def test_redo_event(self):
63	n/a	text = self.text
64	n/a
65	n/a	text.insert('insert', 'foo')
66	n/a	text.insert('insert', 'bar')
67	n/a	text.delete('1.0', '1.3')
68	n/a	text.event_generate('<<undo>>')
69	n/a	text.event_generate('<<redo>>')
70	n/a	self.assertEqual(text.get('1.0', '1.3'), 'bar')
71	n/a	text.event_generate('<<redo>>')
72	n/a	self.assertTrue(self.delegator.bell.called)
73	n/a
74	n/a	def test_dump_event(self):
75	n/a	"""
76	n/a	Dump_event cannot be tested directly without changing
77	n/a	environment variables. So, test statements in dump_event
78	n/a	indirectly
79	n/a	"""
80	n/a	text = self.text
81	n/a	d = self.delegator
82	n/a
83	n/a	text.insert('insert', 'foo')
84	n/a	text.insert('insert', 'bar')
85	n/a	text.delete('1.2', '1.4')
86	n/a	self.assertTupleEqual((d.pointer, d.can_merge), (3, True))
87	n/a	text.event_generate('<<undo>>')
88	n/a	self.assertTupleEqual((d.pointer, d.can_merge), (2, False))
89	n/a
90	n/a	def test_get_set_saved(self):
91	n/a	# test the getter method get_saved
92	n/a	# test the setter method set_saved
93	n/a	# indirectly test check_saved
94	n/a	d = self.delegator
95	n/a
96	n/a	self.assertTrue(d.get_saved())
97	n/a	self.text.insert('insert', 'a')
98	n/a	self.assertFalse(d.get_saved())
99	n/a	d.saved_change_hook = Mock()
100	n/a
101	n/a	d.set_saved(True)
102	n/a	self.assertEqual(d.pointer, d.saved)
103	n/a	self.assertTrue(d.saved_change_hook.called)
104	n/a
105	n/a	d.set_saved(False)
106	n/a	self.assertEqual(d.saved, -1)
107	n/a	self.assertTrue(d.saved_change_hook.called)
108	n/a
109	n/a	def test_undo_start_stop(self):
110	n/a	# test the undo_block_start and undo_block_stop methods
111	n/a	text = self.text
112	n/a
113	n/a	text.insert('insert', 'foo')
114	n/a	self.delegator.undo_block_start()
115	n/a	text.insert('insert', 'bar')
116	n/a	text.insert('insert', 'bar')
117	n/a	self.delegator.undo_block_stop()
118	n/a	self.assertEqual(text.get('1.0', '1.3'), 'foo')
119	n/a
120	n/a	# test another code path
121	n/a	self.delegator.undo_block_start()
122	n/a	text.insert('insert', 'bar')
123	n/a	self.delegator.undo_block_stop()
124	n/a	self.assertEqual(text.get('1.0', '1.3'), 'foo')
125	n/a
126	n/a	def test_addcmd(self):
127	n/a	text = self.text
128	n/a	# when number of undo operations exceeds max_undo
129	n/a	self.delegator.max_undo = max_undo = 10
130	n/a	for i in range(max_undo + 10):
131	n/a	text.insert('insert', 'foo')
132	n/a	self.assertLessEqual(len(self.delegator.undolist), max_undo)
133	n/a
134	n/a	if __name__ == '__main__':
135	n/a	unittest.main(verbosity=2, exit=False)